The musical is one of those things that theatergoers either love or hate. For some, there’s nothing more transcendent than immersing themselves in the combination of spoken dialogue, singing, acting and dancing. For others, the entire construct rings false, somewhat hokey and attempts and fails to push beyond the limits of suspending disbelief.

“In real life, people don’t burst into song,” a character critical of the genre said early in Act One during the sold-out Saturday night performance at Bay Street Theater. Exactly.

“My Life is a Musical,” making its world premiere in Sag Harbor, is one show that is guaranteed to make a fan of everyone who sees it. Gently poking fun of the genre, the musical comedy tells the story of Parker, played by Howie Michael Smith, a likable but shy everyman who hears and sees people excitedly singing, dancing and carrying on instead of what they are really doing, which is talking, walking, and acting normally. The rub: Parker hates musicals.

Turning the Broadway form on its ear, “Musical” allows those who watch it to feel very much that they are in on the joke. Charming, clever, and full of heart, style and verve, the Adam Overett (he brilliantly wrote the musical comedy book, music and lyrics) and Marlo Hunter (she directed and choreographed) production is sure to be a smash. I predict that it will be the next big thing to hit the Great White Way.

The writing is tight and laugh-out-loud funny. The musical numbers are catchy and enthusiasm provoking. The pacing between serious and outrageous scenes is impeccable. The characters are likable and relatable. And the cast, of which there are no bold-faced names, is absolutely superb.

Smith in particular, a talented triple threat that looks like a blend of Jason Biggs, Ben Stiller and Bradley Cooper, is perfection as Parker. He’s the socially awkward underdog who audience members find themselves rooting for before he even opens his mouth, and then that much more so once he does.

Playing JT, his love interest, Kathleen Elizabeth Monteleone is pitch perfect as a tone-deaf rock and roll band manager. She’s plucky and full of passion, just what Parker needs in order to grow and accept himself and his perceived flaws. Monteleone, who has a phenomenal voice, particularly shines in “Someone Else’s Song,” where she beautifully belts out that she can’t sing a lick.

Deeper level fun poking comes in the form of The Zeitgeist’s band lead singer, Zach, a pretty-boy hack who is the recipient of Parker’s musical-inspired songwriting talents—a Christian de Neuvillette to Parker’s Cyrano de Bergerac if you will. Justin Matthew Sargent, who starred in Broadway’s “Rock of Ages,” totally nails the intellectually challenged rock star persona, to great comic effect. He’s thoroughly watchable.

The most entertaining character was Randy, an overly dramatic 1940s-era film noir-esque gumshoe, who had the best lines and the funniest setups of the entire play. Robert Cuccioli, a veteran actor with considerable stage experience, hammed it up in a way that was beyond brilliant. Think Adam West playing himself as the Mayor on “Family Guy.” His fast-talking antics included insisting that Parker meet him at 1 a.m. at a bar called “Midnight” and at another called “The Corner,” which was located in the middle of the block. Cuccioli’s portrayal of Parker’s foil had me laughing so hard that I was crying many, many times throughout the night.

The multi-talented supporting cast—which includes Wendi Bergamini, Adam Daveline, Danyel Fulton, and Brian Sills—was amazing. Keeping count of the dizzying number of characters (though my favorite was Sills’s bellhop) and super hot quick changes was impossible but each was memorable and mesmerizing. And each and every one of actors in the show gave it with gusto.

Every single detail of this production—from the cheeky set to the cleverly utilized musicians, and far, far beyond—is an absolute winner. And judging from the very enthusiastic response of the audience on Saturday night, I’m definitely not alone in my thoughts. As the entire cast sings in the musical finale, “It’s the kind of show that I love.” Nobody could say it any better than that.